OH- absorption and nonvolatile holographic storage properties in Mg:Ru:Fe:LiNbO3 crystal as a function of Mg concentration
Xu Chao (徐超)a, Zhang Chun-Lei (张春雷)b, Dai Li (代丽)a, Leng Xue-Song (冷雪松)a, Xu Lei (许磊)a, Xu Yu-Heng (徐玉恒)a
a School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001, China; b Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China
Abstract Mg:Ru:Fe:LiNbO3 crystals with various concentrations of MgO (in mole) and fixed content of RuO2 and Fe2O3 (in mass) are grown with the Czochralski method from the congruent melt. Their infrared transmission spectra are measured and discussed to investigate the defect structure. With the increase of Mg2+ concentration the blue nonvolatile holographic storage capability is enhanced. The nonvolatile holographic storage properties of dual-wavelength recording of Mg(7 mol%):Ru:Fe:LiNbO3 nonvolatile diffraction efficiency, response time and nonvolatile sensitivity reach 59.8%, 70 s, and 1.04 cm/J, respectively. Comparing Mg(7 mol%):Ru:Fe:LiNbO3 with Ru:Fe:LiNbO3 crystal, the response time is shortened apparently. The nonvolatile diffraction efficiency and sensitivity are raised largely. The mechanism in blue photorefractive nonvolatile holographic storage is discussed.
Fund: Project supported by the Fundamental Research Funds for the Central Universities of China (Grant No. DL12AB03) and the National Natural Science Foundation of China (Grant No. 60777006).
Xu Chao (徐超), Zhang Chun-Lei (张春雷), Dai Li (代丽), Leng Xue-Song (冷雪松), Xu Lei (许磊), Xu Yu-Heng (徐玉恒) OH- absorption and nonvolatile holographic storage properties in Mg:Ru:Fe:LiNbO3 crystal as a function of Mg concentration 2013 Chin. Phys. B 22 054203
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